<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录表单区 -->
      <el-form  ref="loginFormRef" :model="loginForm"  :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-person"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-lock" type="password"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
           <el-button type="primary" @click="login">登录</el-button>
           <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data(){
    return{
      // 这是登录表单的数据绑定对象
      loginForm:{
        username: 'admin',
        password: '123456'
      },
      // 这是表单的验证规则对象
      loginFormRules:{
        // 验证用户名是否合法
        username:[
          { required: true, message: "请输入登录名称", trigger:"blur" },
          { min: 3, max: 10, message: "长度在3~10个字符之间", trigger:"blur"}
        ],
        // 验证密码是否合法
        password:[
          { required: true, message: "请输入密码", trigger:"blur" },
          { min: 6, max: 15, message: "长度在6~15个字符之间", trigger:"blur"}
        ]
      }
    }
  },
  methods:{
    // 点击重置按钮，重置登陆表单
    resetLoginForm(){
      console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    login(){
      this.$refs.loginFormRef.validate( async valid=>{
        // console.log(valid)
        if(!valid){
          return
        }
        const res =  await this.$axios.post('login', this.loginForm)
        if(res.data.meta.status !== 200){
          return this.$message.error('登陆失败')
        } else {
          this.$message.success('登陆成功')
        }
        // 1.将登陆成功之后的token,保存到客户端的sessionStorage中
        console.log(res)
        sessionStorage.setItem('token', res.data.data.token)
        // 2. 通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push('/home')
      })
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%); // 在横轴和纵轴上各移动百分之五十
  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    // 向元素添加阴影
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      height: 100%;
      width: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
  .login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
  .btns{
    display: flex;
    justify-content: flex-end;
  }
}
</style>